code: def test_device_deepcopy(device):
      device2 = copy.deepcopy(device)
      assert device is device2
  
file_path: chainer/tests/chainerx_tests/unit_tests/test_device.py
imports: import copy
  import pickle
  import pytest
  import chainerx
label_desc: Use image node_id 14 for calling a global function with example usage: test_device_deepcopy(device) without return types